Centrifugal for separating solids from liquids.



no. 669,732. Patented Marl I2, law. 0. UHLSSON CENTRIFUGAL FOR SEPABATING SOLIDS FROM LIQUIDS.

(Application filed Sept. 24, 1900.)

(No Model.)

INVENTOR ATTORNEY m: nonms PETERS w. PNOYO-LJTHO" WASHINGTON, n. c.

UNITED TATES ATENT FFICE.

OLOF OHLSSON, OF SGDERTELJE, SWEDEN.

SPECIFICATION forming part of Letters Patent No. 669,732, dated March 12, 1901- Application filed September 24, 1900. Serial No, 30,943. (No model.)

To ztZZ whom it may concern: in a zigzag direction from one chamber to an- Be it known that I, OLOF OHLssON, a citiother, by which means a substantially comzen of the United States, residing at Soderplete separation of the solid particles is eftelje, in 'the Kingdom of Sweden, have infected.

vented certain new and useful Improvements Referring to the drawings, 1 designates the in Drums for Centrifugal Machines, of which drum as a whole. It may be circular in crossthe following is a specification. section at all points in its height. At top and In separating bycentrifugalaction thesolid bottom it is tapered or conical, and at the particles from a liquid in which they are susmiddle part its side wall is corrugated. 2 is [O pended the said solid particles may be allowed the upright axial inlet-tube of the drum,which to pass out through an aperture in the wall is closed at the proper point by a bottom or of the rotating drum and the liquid be allowed plug 3. Above this plug, in the walls of the to discharge through an outlet nearer the tube 2, are apertures 4 for the inflowing liqdrum axis. A difficulty, however, usually uid. The liquid flows through these aper- I 5 arises in this procedure because the solid partures into an annular space 5, between the ticles, instead of discharging, collect and lower part of the axial tube and an outer form a deposit or solid layer on the inner face tube 6, which extends down nearly to the of the drum-wall. Attempts have been made bottom of the drum, and thence down through to remedy this defect by giving the drum a this passage to the bottom of the drum.

2o conical shapenamely, narrow or contracted The drum is divided into superposed chamatthe topandlocatingthe outlet atthe wider bers 7 by diaphragms situated at the points part of the drum. In this case, however, the of least diameter 8 and extending from the efficiency is much impaired from the fact that tube 6 out to the drum-wall. Each diaphragm it is at the Widest part only,.which is a very consists of a lower metal plate 9 and an up- 25 limited portion of the entire height, that the per metal plate 10 separated from the lower,

centrifugal force is sufficient to effect the so as to leave a space or passage 11 between proper separation of the solid from the liquid. them. The plate 9 fits closely to the drum- The object of the present invention is to wall; but at its inner edge next to the tube 6 provide a centrifugal drum or vessel which it has apertures 12 for the liquid to pass up- 0 shall overcome in a good degreethe difficulty ward into the space 11. The upper plate 10 above indicated. fits snugly to the tube 6, but does not extend In the accompanying drawings,which illusquite out to the drum-wall, so that the liqtrate an embodiment of the invention, Figure uid flows outward intothe chamber 7 of the 1 is a vertical axial section of the drum, and drum next above about the outer edge of the 5 Fig. 2 is a transverse section of the same at plate 10.

line a in Fig. 1. Fig. 3 illustrates a slightly- In the wall of the drum at the points of modified construction. greatest diameter 13 are the outlets 14 for the As indicated clearly in Fig. 1, the drum has solid particles, and in the narrow upper part a somewhat-corru ated marginal outline at of the drum-wall is the outlet 15 for the pure 0 its upright sides, the outlets for the solid parliquid.

- ticles being situated. at the points of greatest The particular number of superposed chamdiameter, and it has diaphragms at the points bers 7 in the drum is not important to my inof least diameter which compel the liquid vention, nor is it important just how the diamass in flowing upward to pass the first or phragms which separate the chambers are 5 lowermost plate of the diaphragm near the constructed so long as they perform the funcdrum-axis, then flow outward between the tions for which they are intended. 5 plates of the diaphragm and enter the next It is preferred to place diaphragms at the chamber above near the outer wall of the points 8 of least diameter; but they may also drum. Thus the upward flow of the liquid is be placed at other points, as indicated in Fig.

- of any known form.

3, where such an extra diaphragm is shown in the lower chamber '7. The outlets may be It will be noted that there may be several outlets 14C in each tier or from each chamber 7 in the drum.

Having thus described my invention, I claim 1. A drum for a centrifugal machine, having a circumferentially-corrugated side wall, with tiers of outlets for the heavier particles at the points of greatest diameter, and having between said points of greatest diameter transverse diaphragms, said diaphragms being provided with passages for the flow of the liquid upward and outward, substantially as set forth.

2. A drum for a centrifugal machine, havoutward flow of the liquid, substantially as set forth.

3. A drum for a centrifugal machine, having a circumferentially-corrugated side wall with tiers of outlets for the heavier particles at the points of greatest diameter, and transverse diaphragms between said tiers of outlets and dividing the drum into superposed chambers, each of said diaphragms comprising a lower plate 9, fitting to the side Wall of the drum and having apertures 12 at its inner edge, and an upper plate 10, elevated above the plate 9, so as to provide a passage 11 for the outward flow of the liquid, substantially as set forth.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

OLOF oHLssoN.

Witnesses:

ERNST SVANQVIST, A. F. LUNDBORG. 

